Flight OddsUA4731 BUF → ORD
United Airlines · Buffalo, NY to Chicago, IL · 16 flights observed, 2025-12-02 to 2025-12-17 · 474 mi
UA4731 covers more than one route in the data window — the stats below are for BUF → ORD, the one it has flown most recently. The others are linked under “Other routes”.
On-time arrival
44%
Median delay
+45 min
90th percentile
+187 min
Cancellation rate
0%
How often is UA4731 on time?
Across 16 flights on BUF → ORD from 2025-12-02 to 2025-12-17, UA4731 arrived within 15 minutes of schedule 44% of the time. The median arrival delay was +45 min, and the worst 10% of flights arrived +187 min or later. 0% of flights were cancelled.
Delay distribution
Arrival delay for completed flights (excludes cancellations and diversions).
| Arrival | Flights | Share |
|---|---|---|
| Early / on-time | 7 | 44% |
| 16-30 min | 0 | 0% |
| 31-60 min | 3 | 19% |
| 61-120 min | 4 | 25% |
| 2+ hrs | 2 | 13% |
Performance by month
| Month | Flights | On-time | Avg delay |
|---|---|---|---|
| 2025-12 | 16 | 44% | +81 min |
Performance by day of week
| Day | Flights | On-time |
|---|---|---|
| Mon | 2 | 50% |
| Tue | 3 | 33% |
| Wed | 3 | 33% |
| Thu | 2 | 50% |
| Fri | 2 | 100% |
| Sat | 2 | 50% |
| Sun | 2 | 0% |
Other routes
Related
Based on US Department of Transportation Bureau of Transportation Statistics on-time data. Loading live conditions and full charts…